ON <merge_search_condition> Specifies the conditions on whichjoins withtarget_tableto determine where they match. Caution It's important to specify only the columns from the target table to use for matching purposes. That is, specify columns from the target table that are compared to the ...
Because the MERGE statement performs a full table scan of both the source and target tables, I/O performance can be affected when using the TOP clause to modify a large table by creating multiple batches. In this scenario, it is important to ensure that all successive batches target new rows...
# Query_time: 91.511261 Lock_time: 0.000124 Rows_sent: 2050008 Rows_examined: 2150010 Thread_id: 19187 Errno: 0 Killed: 0 Bytes_received: 0 Bytes_sent: 58061725 Read_first: 2 Read_last: 0 Read_key: 2 Read_next: 0 Read_prev: 0 Read_rnd: 0 Read_rnd_next: 2150012 Sort_merge_passes...
-- Multiple MATCHED and NOT MATCHED clauses with schema evolution enabled. > MERGE WITH SCHEMA EVOLUTION INTO target USING source ON source.key = target.key WHEN MATCHED THEN UPDATE SET * WHEN NOT MATCHED THEN INSERT * WHEN NOT MATCHED BY SOURCE THEN DELETE 相关文章 删除 INSERT 转为 UP...
二.Index Merge 与执行计划 The Index Merge access method retrieves rows with multiple range scans and merges their results into one. This access method merges index scans from a single table only, not scans across multiple tables. The merge can produce unions, intersections, or unions-of-interse...
MERGE INSERT SpecifyingKEEP PLANmakes sure a query isn't recompiled as frequently when there are multiple updates to a table. KEEPFIXED PLAN Forces the Query Optimizer not to recompile a query because of changes in statistics. Sp...
Avoid incorrect results from Merge Right Anti Join plans Prevent infinite loop in VACUUM Fix failure after attaching a table as a partition, if the table had previously had inheritance children Fix input of ISO-8601 “extended” time format for types time and timetz ...
other in any way. This means that, unlike using a cursor in which the query is executed once and state is maintained on the server, the client application is responsible for tracking state. To achieve stable results between query requests usingOFFSETandFETCH, the following conditions must be ...
sp_MSchange_merge_agent_properties (Transact-SQL) If you have a Publisher and Distributor that are running SQL Server 2000, you can change the credentials under which agents make connections by using sp_changedistpublisher and sp_changesubscriber. However, if you upgrade the Distributor to SQL...
{ SPLIT | MERGE } RANGE (boundary_value) | SWITCH [ PARTITION source_partition_number TO target_table_name [ PARTITION target_partition_number ] [ WITH ( TRUNCATE_TARGET = ON | OFF ) } [;] <column_definition>::= { column_name type_name [ ( precision [ , scale ] ) ] [ <column...